Question: Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?
Options
A : Power can be measured by this method only for star connected loads
B : When two wattmeters have equal readings power factor is 0.5.
C : When power factor is 1, one of the wattmeters readings is zero
D : When the two wattmeter read equal and opposite, p.f. is zero.
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